It is not that far'fetched for people to ask the postal service or Ups or whomever to hang onto a package for pickup. Lot of times it is because packages get stolen when left in the mail box or front porch, and people feel it is safer in the hands to the deliverer than sitting where random hands can grab it.

Even if he didn't request for it to be held at the post office, there is still the potential an employee steals these when it arrives to the facility and before it is loaded onto the carrier. I don't think his request for USPS to hold it CAUSED it to be stolen.

Never said it caused it, if that's what you are saying. Just said it was lost/Stolen in that transition...